#include "com_ukao_cashregister_rfid_SerialPortHelper.h"
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <jni.h>
#include <termios.h>
#include <errno.h>

#include "android/log.h"
static const char *TAG="serial_port";
#define LOGI(fmt, args...) __android_log_print(ANDROID_LOG_INFO,  TAG, fmt, ##args)
#define LOGD(fmt, args...) __android_log_print(ANDROID_LOG_DEBUG, TAG, fmt, ##args)
#define LOGE(fmt, args...) __android_log_print(ANDROID_LOG_ERROR, TAG, fmt, ##args)

/**
 * 获取波特率
 */
static speed_t getBaudRate(jint baudRate){
    switch(baudRate) {
        case 0: return B0;
        case 50: return B50;
        case 75: return B75;
        case 110: return B110;
        case 134: return B134;
        case 150: return B150;
        case 200: return B200;
        case 300: return B300;
        case 600: return B600;
        case 1200: return B1200;
        case 1800: return B1800;
        case 2400: return B2400;
        case 4800: return B4800;
        case 9600: return B9600;
        case 19200: return B19200;
        case 38400: return B38400;
        case 57600: return B57600;
        case 115200: return B115200;
        case 230400: return B230400;
        case 460800: return B460800;
        case 500000: return B500000;
        case 576000: return B576000;
        case 921600: return B921600;
        case 1000000: return B1000000;
        case 1152000: return B1152000;
        case 1500000: return B1500000;
        case 2000000: return B2000000;
        case 2500000: return B2500000;
        case 3000000: return B3000000;
        case 3500000: return B3500000;
        case 4000000: return B4000000;
        default: return -1;
    }
}

JNIEXPORT jobject JNICALL Java_com_ukao_cashregister_rfid_SerialPortHelper__1initPort
        (JNIEnv *env, jclass, jstring devName, jint baudRate)
{
    LOGI("This is log---------------");
    jboolean iscopy;
    jobject mFileDescriptor;
    const char *devName_utf = env->GetStringUTFChars( devName, &iscopy);
    LOGI("devName=%s,BaudRate= %d", devName_utf, baudRate);

    int fd = -1;
//    if (-1 == (fd = open(devName_utf, O_RDWR | O_NOCTTY | O_NONBLOCK | O_NDELAY))) {
    if (-1 == (fd = open(devName_utf, O_RDWR | O_NONBLOCK))) {
        LOGE("Can't Open %s[%d]: %s", devName_utf, errno, strerror(errno));
        return NULL;
    }

    speed_t speed = getBaudRate(baudRate);
    if (speed != -1) {
        //设置串口参数
        struct termios Opt;
        tcgetattr(fd, &Opt);
        cfmakeraw(&Opt);
        tcflush(fd, TCIFLUSH);
        cfsetispeed(&Opt, speed);
        cfsetospeed(&Opt, speed);

        if (tcsetattr(fd, TCSANOW, &Opt) == 0) {
            LOGI("devFileId=%d", fd);
    		jclass cFileDescriptor = env->FindClass("java/io/FileDescriptor");
    		jmethodID iFileDescriptor = env->GetMethodID(cFileDescriptor, "<init>", "()V");
    		jfieldID descriptorID = env->GetFieldID(cFileDescriptor, "descriptor", "I");
    		mFileDescriptor = env->NewObject(cFileDescriptor, iFileDescriptor);
    		env->SetIntField(mFileDescriptor, descriptorID, (jint)fd);
            return mFileDescriptor;
        }else{
            LOGE("SetupSerial![%d]: %s", errno, strerror(errno));
        }
    }else{
        LOGE("Invalid baudRate");
    }

    if(fd != -1) {
        LOGI("close serial port");
        close(fd);
    }

    env->ReleaseStringUTFChars( devName, devName_utf);
    return NULL;
}

/*
 * Class:     cashregister_ukao_com_serialportpro_SerialPortHelper
 * Method:    _closePort
 * Signature: (Lcashregister/ukao/com/serialportpro/SerialPortHelper;)I
 */
JNIEXPORT jint JNICALL Java_com_ukao_cashregister_rfid_SerialPortHelper__1closePort
        (JNIEnv *env, jclass thiz,jobject serialport)
{


    LOGI("Java_cashregister_ukao_com_serialportpro_SerialPortHelper__1closePort");
    //获取类信息句柄
    jclass SerialPortClass = env->GetObjectClass(serialport);
    //查找标准库的FileDescriptor类的类信息
    jclass FileDescriptorClass = env->FindClass("java/io/FileDescriptor");

    //找到成员变量在类中ID
    jfieldID mFdID = env->GetFieldID(SerialPortClass, "mFileDescriptor", "Ljava/io/FileDescriptor;");
    jfieldID descriptorID = env->GetFieldID(FileDescriptorClass, "descriptor", "I");

    //获取serialport对象中相应ID的成员变量的值
    jobject mFd = env->GetObjectField(serialport, mFdID);

    //获取mFd对象中相应ID的成员变量的值
    jint descriptor = env->GetIntField(mFd, descriptorID);

    LOGD("close(fd = %d)", descriptor);
    if(descriptor > 0) {
        close(descriptor);
        return 0;
    }
    return -1;
}



